login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A099939 as a simple table

na(n)
019
115
218
318
417
518
619
716
820
919
1015
1111
1214
1314
1413
1514
1615
1712
1816
1915
2018
2114
2217
2317
2416
2517
2618
2715
2819
2918
3018
3114
3217
3317
3416
3517
3618
3715
3819
3918
4017
4113
4216
4316
4415
4516
4617
4714
4818
4917
5018
5114
5217
5317
5416
5517
5618
5715
5819
5918
6014
6110
6213
6313
6412
6513
6614
6711
6815

[19,15,18,18,17,18,19,16,20,19,15,11,14,14,13,14,
 15,12,16,15,18,14,17,17,16,17,18,15,19,18,18,14,
 17,17,16,17,18,15,19,18,17,13,16,16,15,16,17,14,
 18,17,18,14,17,17,16,17,18,15,19,18,14,10,13,13,
 12,13,14,11,15]